5G Technology is based on three pillars. Let's discuss the basic ideas of all three concepts of 5G and details about URLCC workflow. The specifications of 5G NR in Standalone operation are due for completion in June 2018, which will provide a complete set of specifications for the 5G Core Network that goes beyond Non-Standalone. The ‘full’ 5G System includes: eMBB (enhanced Mobile Broadband) URLLC (Ultra Reliable Low Latency Communications) mMTC (massive Machine Type Communications) The initial phase of 5G Non-Standalone deployments focuses on eMBB, which provides greater data-bandwidth complemented by moderate latency improvements on both 5G NR and 4G LTE. This will help to develop today’s mobile broadband use cases such as emerging AR/VR media and applications, UltraHD or 360-degree streaming video and many more. mMTC has been already developed as part of 3GPP Release 13/14 low power wide area (LPWA) technologies, which includes NB-IoT. These are expected to meet most 5G mMTC requirements, while others that require more bandwidth with ultra-reliable low latency (full URLLC) will require the 5G Core deployment for full end-2-end latency reduction. Mission critical applications that are especially latency-sensitive will also require wide coverage, which is highly unlikely in early 5G deployments, so this development will come later. MediaTek continues to heavily invest in the development of 5G products and is committed to accelerating its adoption. Our intention is to bring technology to the mid-tier market from day one in accordance with our brand philosophy. This contrasts with the usual premium-first approach the rest of the industry often focuses on, and we believe we can offer a unique and powerful platform.

1. 5G – URLLCUltra Reliable low latency communication
Critical MTC
TRAFFIC SAFETY &
CONTROL
INDUSTRIAL APPLICATION & CONTROL
REMOTE
MANUFACTURING,
TRAINING, SURGERY

2. Process
Automation
Remote
Control
Factory Automation
100ms
10ms
1ms
Latency
10m 100m 1km 10km 100km 1000km
range
Smart Grid
Intra-
substation
Automated
Driving
Smart Grid
Inter- substation
Automated
Guided Vehicle
Intelligent Transport Systems

3. Physical-layer functionality
• Channel coding
• Additional frequency/time/spatial diversity
• Scheduling mechanisms
• Retransmission functionality
• Control channel structure
• …
Higher-layer functionality
• UP reliability, e.g. multipath data delivery
• CP reliability, e.g. RRC reliability
• Enhanced mobility
• …

4. Latency
1. Assignment of resources
Data arrival at transmitter
2. Frame alignment
3. Transmission
4. Receiver processing
Data delivery at receiver
time
› Utilization of eCP at the costs of higher overhead.
– A flexible numerology with a good trade-off between latency
and CP overhead should be supported
› A fast HARQ ACK/NACK scheme desired,
– The HARQ feedback is provided ~1 OFDM after data RX
with quick re-TX in a subsequent slot

5. latency [ms]Guaranteed
CDF[%]
100-e
Focus on the 99.99..9 percentile
95
50
e - failure probability can be 10-4 – 10-6 or even 10-9 (e.g. factory automation)
(a fraction of lost, erroneous or delayed messages below a certain value)
LATENCY
RELIABILITY
1 s
1 ms
10 ms
100 ms
10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9
Example current system
TR 38.913
• eMBB:
• 4ms UL/DL average
• URLLC:
• 0.5ms UL/DL average
• 1ms with 1-10-5 reliability UL/DL
Example trade-off between reliability and latency

6. High reliability (e.g. 10-5 – 10-9)
-100 -80 -60 -40 -20 0
10
-10
10
-8
10
-6
10
-4
10
-2
10
0
Fading Gain (dB)
CDF
Rayleigh fading channel
90 dB
50-90 dB fading margin

7. -100 -80 -60 -40 -20 0
10
-10
10
-8
10
-6
10
-4
10
-2
10
0
Fading Gain (dB)
CDF
-100 -80 -60 -40 -20 0
10
-10
10
-8
10
-6
10
-4
10
-2
10
0
Fading Gain (dB)
CDF
Div Order = 1
Div Order = 2
Div Order = 4
Div Order = 8
Div Order = 16
18 dB
90 dB
Rayleigh fading channel
Diversity is key for URLLC